Study on flame height of merged flame from multiple fire sources

W. G. Weng, D. Kamikawa, Y. Fukuda, Yuji Hasemi, K. Kagiya

    Research output: Contribution to journalArticle

    41 Citations (Scopus)

    Abstract

    A series of experiments to study merged flame from multiple fire sources was carried out. The porous 15-cm2 burner was used as a unit burner and propane was employed as a fuel. Many burners with various heat release rates were placed in a square configuration with various separation distances. Flame height was measured using video images and temperature distribution with height was measured using thermocouples. The numerical results from the Fire Dynamics Simulator (FDS) of the National Institute of Standards and Technology was compared with the experimental data, and the comparison results show that FDS correctly simulates the merged flame from multiple fire sources. In addition, an empirical model to estimate the merged flame height was developed considering the effect of separation distance. The validity of this model was confirmed from the comparison with the simulation results, and excellent agreement is found between the calculated merged flame height from the model and the numerical ones. To study the detailed structure of merged flame, 3×3 fire source configuration was taken as an example to quantitatively show oxygen mass fraction profiles and velocity fields, which were also given to indicate the formation mechanism of the merged flame.

    Original languageEnglish
    Pages (from-to)2105-2123
    Number of pages19
    JournalCombustion Science and Technology
    Volume176
    Issue number12
    DOIs
    Publication statusPublished - 2004 Dec

    Fingerprint

    flames
    Fires
    Fuel burners
    burners
    Simulators
    simulators
    Propane
    Thermocouples
    Temperature distribution
    thermocouples
    configurations
    Oxygen
    propane
    temperature distribution
    velocity distribution
    heat
    oxygen
    Experiments
    estimates
    profiles

    Keywords

    • Diffusion flame
    • Flame height
    • Flame structure
    • Merged flame
    • Multiple fire sources

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Physical and Theoretical Chemistry
    • Energy Engineering and Power Technology
    • Fuel Technology
    • Engineering (miscellaneous)
    • Fluid Flow and Transfer Processes

    Cite this

    Study on flame height of merged flame from multiple fire sources. / Weng, W. G.; Kamikawa, D.; Fukuda, Y.; Hasemi, Yuji; Kagiya, K.

    In: Combustion Science and Technology, Vol. 176, No. 12, 12.2004, p. 2105-2123.

    Research output: Contribution to journalArticle

    Weng, W. G. ; Kamikawa, D. ; Fukuda, Y. ; Hasemi, Yuji ; Kagiya, K. / Study on flame height of merged flame from multiple fire sources. In: Combustion Science and Technology. 2004 ; Vol. 176, No. 12. pp. 2105-2123.
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